Full adjustability and a streamlined backrest make this series an ideal choice for just about any work settingincluding clean rooms and labs.. Features Concave seat is 18½" wide x 16½" deep x 3" thick Backrest is 15½" wide x 9½" high with full lumbar support Soft-touch pneumatic seat-height adjustment, rearward seat tilt, backrest tilt and height adjustment Optional: Static Control seating with ESD upholstery—Clean Room rated to Class 1/ISO Class 3